Biology 150 - Chapter 12 LEARN Quiz

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Pregunta 1 de 31

Why don’t ecosystems eventually run out of energy?

Selecciona una de las siguientes respuestas posibles:

because there are secondary producers
because photosynthesis is exergonic
because they are open systems
because they are closed systems

Explicación

Pregunta 2 de 31

Which of the following is most likely to be associated with dynamic equilibrium in an ecosystem?

Selecciona una de las siguientes respuestas posibles:

a positive feedback loop
a negative feedback loop
homeorhesis
pulsing states

Explicación

Pregunta 3 de 31

A coyote eats a rabbit, and burns off much of the calories it gains in maintaining body temperature. In this instance, what can we say about entropy and energy?

Selecciona una de las siguientes respuestas posibles:

entropy has decreased, available useful energy has increased
entropy has decreased, available useful energy has decreased
entropy has increased, available useful energy has increased
entropy has increased, available useful energy has decreased

Explicación

Pregunta 4 de 31

Light is often more limiting in aquatic ecosystems than in terrestrial ecosystems.

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 5 de 31

The effects of temperature and precipitation on Net Primary Productivity (NPP) are independent.

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 6 de 31

Ecosystem X houses species with extremely large niches. What can we say is likely regarding the resistance and resilience of this ecosystem?

Selecciona una de las siguientes respuestas posibles:

high resistance and high resilience
low resistance, intermediate resilience
high resilience, intermediate resistance
low resistance and low resilience

Explicación

Pregunta 7 de 31

You estimate kilograms of corn plants (including stalks, shoots, leaves, etc) produced per square meter per year in a field outside of Waterloo. This is best characterized as an estimate of:

Selecciona una de las siguientes respuestas posibles:

net primary productivity
gross primary productivity
standing crop biomass
biomass accumulation ratio

Explicación

Pregunta 8 de 31

Ecosystem “A” retains most of its food web structure and species composition through a period marked by heavy pollution. Nearby Ecosystem ‘B’ however loses 50% of its species diversity and feeding links. Ecosystem ‘A’ is:

Selecciona una de las siguientes respuestas posibles:

more resistant that Ecosystem 'B'
more resilient than Ecosystem 'B'
in a positive feedback loop
both A and B

Explicación

Pregunta 9 de 31

Warm nutrient rich conditions favour growth of an algal bloom in a lake. In fall, the decomposing algae releases yet more nutrients into the lake which leads to an even worse algal bloom the following spring. This is an example of:

Selecciona una de las siguientes respuestas posibles:

negative feedback
a trophic cascade
homeostasis
positive feedback

Explicación

Pregunta 10 de 31

Energy is recycled in detrital food chains.

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 11 de 31

Which of the following ecosystems would you likely observe the highest trophic efficiency in?

Selecciona una de las siguientes respuestas posibles:

an algal-based lake
a grassland
a macrophyte-dominated swamp
a forest

Explicación

Pregunta 12 de 31

Which of the following is likely to have the highest concentrations of a biomagnifying contaminant?

Selecciona una de las siguientes respuestas posibles:

primary producer
primary consumer
secondary consumer
tertiary consumer
all are equal

Explicación

Pregunta 13 de 31

High level carnivores are often part of only one type of food chain – either grazing or detrital.

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 14 de 31

Neither energy nor biomass pyramids can be inverted/upside down (ie. larger at the top than the bottom).

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 15 de 31

Grazing and detrital food chains are independent are not connected.

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 16 de 31

You are studying a three-level food chain (primary producers, herbivores, carnivores). 5000 calories of plant energy are produced. How many of these calories will be convertes into carnivore tissue?

Selecciona una de las siguientes respuestas posibles:

5 calories
50 calories
500 calories
5000 calories

Explicación

Pregunta 17 de 31

A snail that feeds on dead leaves is best characterized as:

Selecciona una de las siguientes respuestas posibles:

a saprophage; part of the detrital food chain
a biophage; part of the grazing food chain
a biophage; part of the detrital food chain
a saprophage; part of the grazing food chain

Explicación

Pregunta 18 de 31

What variable(s) affect(s) the rate of decomposition? Select all that apply, if more than one.

Selecciona una o más de las siguientes respuestas posibles:

amount of lignin
temperature
moisture
oxygen availability

Explicación

Pregunta 19 de 31

What are the eventual end products of decomposition?

Selecciona una de las siguientes respuestas posibles:

inorganic nutrients
secondary productivity
organic matter
detritus

Explicación

Pregunta 20 de 31

Where would we expect nutrient concentrations in streams to be highest?

Selecciona una de las siguientes respuestas posibles:

bottom of a vegetated valley
bottom of a recently logged valley
all of the above are equal

Explicación

Pregunta 21 de 31

What human activities have been implicated in dropped water tables?

Selecciona una de las siguientes respuestas posibles:

paving over natural surfaces
use of irrigation
converting forests to agriculture
all of the above

Explicación

Pregunta 22 de 31

Fertilizing a grassland with nitrogen is MOST likely to result in:

Selecciona una de las siguientes respuestas posibles:

increase in productivity, increase in species richness
increase in productivity, no change in species richness
increase in productivity, transition to N-fixing species
increase in productivity, decrease in species richness

Explicación

Pregunta 23 de 31

Increasing temperatures are causing permafrost and tundra to melt. This causes faster decomposition rates and carbon release, and is an example of:

Selecciona una de las siguientes respuestas posibles:

positive feedback
negative feedback
neutral feedback
none of the above

Explicación

Pregunta 24 de 31

Which of the following is/are potential direct or indirect cause(s) of climate warming? (Select all that apply)

Selecciona una o más de las siguientes respuestas posibles:

increases in Earth's inventory of carbon
increasing urbanization
increasing human-induced fires
burning of fossil fuels

Explicación

Pregunta 25 de 31

Which of the countries below uses the most oil per capita?

Selecciona una de las siguientes respuestas posibles:

China
Canada
India
Australia

Explicación

Pregunta 26 de 31

Climate warming is thought to be related to which of the following ecological observations? (Select all that apply, if more than one)

Selecciona una o más de las siguientes respuestas posibles:

changes in species' ranges
changes in allele frequencies within species
changes in timing of seasonal life history events, such as flowering
changes in extinction rates

Explicación

Pregunta 27 de 31

Globally, we know that climate-induced increases in terrestrial NPP will compensate up for climate-induced decreases in marine NPP.

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 28 de 31

Nutrient run-off into marine coastal environments can cause:

Selecciona una de las siguientes respuestas posibles:

formation of toxic algal blooms
formation of anoxic zones
short-term increases in primary productivity
all of the above

Explicación

Pregunta 29 de 31

What factor(s) is/are affecting the health of coral reef ecosystems?

Selecciona una de las siguientes respuestas posibles:

increasing temperatures
ocean acidification
pollution
all of the above

Explicación

Pregunta 30 de 31

Which is NOT a leading factor in explaining why climate change is increasing terrestrial NPP?

Selecciona una de las siguientes respuestas posibles:

higher CO2
increased sunlight
increased temperatures
increased precipitation in tropics

Explicación

Pregunta 31 de 31

Why is marine NPP thought to be decreasing (leading explanation)?

Selecciona una de las siguientes respuestas posibles:

less sunlight
changes in water density
slower decomposition
less nutrients from terrestrial runoff

Explicación

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	Creado por Laurel McLaughlin hace casi 12 años

Biology 150 (Organismal and Evolutionary Ecology), Chapter 12 (Ecosystem Ecology) LEARN Quiz

Biology 150 - Chapter 12 LEARN Quiz

Pregunta 1 de 31

Why don’t ecosystems eventually run out of energy?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 2 de 31

Which of the following is most likely to be associated with dynamic equilibrium in an ecosystem?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 3 de 31

A coyote eats a rabbit, and burns off much of the calories it gains in maintaining body temperature. In this instance, what can we say about entropy and energy?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 4 de 31

Light is often more limiting in aquatic ecosystems than in terrestrial ecosystems.

Selecciona uno de los siguientes:

Explicación

Pregunta 5 de 31

The effects of temperature and precipitation on Net Primary Productivity (NPP) are independent.

Selecciona uno de los siguientes:

Explicación

Pregunta 6 de 31

Ecosystem X houses species with extremely large niches. What can we say is likely regarding the resistance and resilience of this ecosystem?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 7 de 31

You estimate kilograms of corn plants (including stalks, shoots, leaves, etc) produced per square meter per year in a field outside of Waterloo. This is best characterized as an estimate of:

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 8 de 31

Ecosystem “A” retains most of its food web structure and species composition through a period marked by heavy pollution. Nearby Ecosystem ‘B’ however loses 50% of its species diversity and feeding links. Ecosystem ‘A’ is:

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 9 de 31

Warm nutrient rich conditions favour growth of an algal bloom in a lake. In fall, the decomposing algae releases yet more nutrients into the lake which leads to an even worse algal bloom the following spring. This is an example of:

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 10 de 31

Energy is recycled in detrital food chains.

Selecciona uno de los siguientes:

Explicación

Pregunta 11 de 31

Which of the following ecosystems would you likely observe the highest trophic efficiency in?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 12 de 31

Which of the following is likely to have the highest concentrations of a biomagnifying contaminant?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 13 de 31

High level carnivores are often part of only one type of food chain – either grazing or detrital.

Selecciona uno de los siguientes:

Explicación

Pregunta 14 de 31

Neither energy nor biomass pyramids can be inverted/upside down (ie. larger at the top than the bottom).

Selecciona uno de los siguientes:

Explicación

Pregunta 15 de 31

Grazing and detrital food chains are independent are not connected.

Selecciona uno de los siguientes:

Explicación

Pregunta 16 de 31

You are studying a three-level food chain (primary producers, herbivores, carnivores). 5000 calories of plant energy are produced. How many of these calories will be convertes into carnivore tissue?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 17 de 31

A snail that feeds on dead leaves is best characterized as:

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 18 de 31

What variable(s) affect(s) the rate of decomposition? Select all that apply, if more than one.

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 19 de 31

What are the eventual end products of decomposition?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 20 de 31

Where would we expect nutrient concentrations in streams to be highest?